﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace bai06_shard
{
    class Polygon
    {
        protected int width, height;
        public Polygon(int a)
        {
            width = a;
        }
        public void setValues(int a, int b)
        {
            width = a;
            height = b;
        }
    }
class Rectangle: Polygon {
    public  Rectangle(int w, int h):base(w){
         height=h;
    }
    public int area (){
              return (width * height);
     }
}
    class Program
    {
        static void Main(string[] args)
        {
       Rectangle rect = new Rectangle (8,9);
       Console.WriteLine("rect a:{0}", rect.area());
       return;

        }
    }
}
